Most accurate and up to dated tax rate data, updated and maintained accurately. My last company using Thomson Reuters ONESOURCE data to support tax calculation in global (north America) sales and indirect Tax. ONESOURCE provides most reliable tax rate data at granular level (zip code) and provides periodic updates. This is very important and critical from accurate tax calculation and compliance perspective. In early days, ONESOURCE implementation was a nightmare. Due to the lack of APIs and Web services, we had ONESOURCE data file downloaded and loaded into our CRM and then used homegrown services to support sales applications. In 2016, we replaced that process once ONESOURCE provided effective APIs in their cloud based tax automation initiatives. APIs are pretty good, reasonably fast and provides necessary information to your sales applications (mobile, e-com) for tax calculation. We were able to seamlessly integrate ONESOURCE with our Mobile, e-com with little effort.
Pretty good reporting, easy to schedule and download report in different format like CSV, Crystal report and Pdf
SOAP based web services are bulky and less efficient. Though response time is reasonable but could be much faster. I like the data, accuracy of data. updates but their technology investment is a big question. While integration with SAP systems was fairly reasonable, ability to integrate with custom CRM system is nightmare.
Pros: best and accurate tax (sales and indirect) data with regular update.
Cons: Bulky SOAP based web services and little hard to implement with custom CRM
Sales tax and Indirect Tax calculation for north America region. Must be accurate and compliant with local regulations.